Picker-stick check



E. H. RYON AND n. E. WELSH.

PiCKER STICK CHECK.

APPucATmN FILED Firmas. 1920.

1,366,952. Patented Feb. 1, 1921.

lmlllllill lillillllllillllll Ill UNITED STATES" PATENT; oF-FICE.

CHUSETTS, ASSIGNOR OF MASSACHUSETTS.

TO CROMPTON 6c KNOWLES LOOM WORKS, A CORPORATION PICKER-STICK CHECK.

Specication of Letters Patent.

Patented Feb. 1, 1921.

Application led February 26, 1920. Serial No; 361,499.

To all w 7mm 'it'may concern.'

Be it `known that we,-ErrA H. RYON and RICHARD E. WELSH, citizens of the United States, said RYoN residing at Waltham, in the county of Middlesexand State of Massachusetts, said lVELsH residing at New Bedford, county of Bristol, and State of Massachusetts, have .invented a new anduseful Picker-StickCheck, of which the following is a specification. j i

This invention` relates to a device for checking the movement of a picker stick'and for bringing a shuttle gradually to rest at a predetermined` point.

It is the objectof our invention to provide a device which shall apply a gradually in creasing friction pressure to the picker stick as` the shuttle is boxed,` and which shall promptly releaseall'friction when the picker stick is given its operative movement in the oppositel direction. p j

With this general object in-view an important featureof our invention relates to the provision of yieldablefriction members in connection with means for forcing said members against.the picker stick with increasing pressure as the stick is moved toward the end of the lay. In` the preferred form of our invention, an adjustablecam device is employed to produce such increasing pressure. i

Uur invention further relates to certain arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of our invention is shown in the drawings in which- Figure 1 is a plan view of our improved check;

Fig. 2 is a similar view, partly in section, and showing the parts in a different position;

Fig. 3 is an end elevation of our invention applied to a lay, and

Fig. 4 is a transverse sectional elevation taken along the line 4-4 in Fig. 1.

Referring to the drawings, we have shown a lay 1() and a portion of a picker stick 11, both of the usual form.V A U-shaped frame or casting 12 is rigidly secured ,to the lay 10 by an upwardly extending projection or bracket 13. The two portions of the casting 12 extend toward the center of the loom upon both. sides of the picker stick 11. A pair of friction members 14,' preferably of wood, are longitudinally slidable in recesses in the inner face of the frame 12, as best shown in Fig. 4.

Studs are mountedin-lugs 16 at the open end of the frame 12, and project into openings 17 in the ends of the friction members 14. Each stud is provided with a washer 18 and a spring 19 by whichits frictron member is moved yieldingly toward the end of the lay.

Each member 14 has a deep slot 20 by which one end of said member is divided into two parts 14 and 14". The parts 14a are'positioned to engage the picker Istick. 11 as it` moves betweenthem toward the end ofthe lay, and the parts 14h` are beveled at their outer ends to engageinwardly-facing camsurfaces ona camblock21 longitudinally adjustable in the recesses of the frame 12. Suitable adjusting screws 22 and 23 are provided for adjusting and positioning the block 21.1 A lug 24: extends inward from the blockand serves to separate the members 14a and limit vmovement thereof.`

Having described the construction of our improved picker stick check we 'will now describe the method of operation thereof:

.The springs 19 normally move the membersp14 tothe right, as shown in the draw-` ings, until the beveled Jortions 14b engage the cam block 21 and t e friction portions 14L engage the lug 24. As the shuttle enters the box, the picker stick is moved to the right in frictional engagement with the portions 14a. Such engagement not only forces the portions 14a apart, thereby increasing the friction, but also forces the portions 14b against the cam block 21 by which said portions are moved inward, still further increasingthe pressure upon the stick 11. The shuttle is thus brought to rest by the increasing friction applied through the portions 14"L to the sides of the stick 11.

lVhen the picker stick is given its operative or picking movement in the opposite direct-ion, the members 14 move with the picker stick for a suflicient distance to separate the beveled portions 14b from the cam block, thereb releasing the friction upon the stick. his release occurs within the first fraction of an inch of travel of the stick, as indicated in dotted lines in Fig.

2, and the stick is thereafter free to pick the shuttle.

We have thus provided a cheek Which applies increasing force during the boxing of the shuttle and ,which is released with great promptness as soon as the operative picking movement is begun. Many of the advantages of our invention may be obtained by the use of a single friction member but the use of two members is preferred. Having thus described our invention it will be evident that changes and modifica- Htions can bejmade therein by those skilled in the art Within the spirit and scope of our invention as set forth in the claims, and We do not Wish to be otherwise limited to the details herein disclosed, but what We claim .i members mounted in said frame and held for longitudinal movement only vlat one end thereof, said members being beveled at theopposite end, and a camk device engaging the beveled ends of said members, thereby forcing the same against the picker stick and ylimiting longitudinal movement of said members. v A

3. In a loom having a lay and a picker stick, a picker stick check comprising a frame fixed to the lay, a friction member mounted for limited longitudinal movement in said frame, and a cam device fixed relative to the lay and effective to increase thc pressure of said member on said stick as said member moves longitudinally in said frame toward said device.

4. In a loom having a lay and a picker stick, a picker stick check comprising a frame fixed to the lay, a block longitudinally adjustable in said frame and having opposite inwardly-disposed cam faces, and a pair of friction members longitudinally movable in said frame and engaging said cam faces when moved toward the end of the lay by the picker stick.

5. In a loom having a lay and a picker stick, a picker stick check comprising a frame fixed to the lay, a block longitudinally adjustable in said frame and having opposite inwardly-disposed cam faces, and a pair of friction members longitudinally movable in said frame and engaging said cam faces when moved toward the end of the lay, each of said members being formed of a single piece of Wood slotted longitudinally at the end adjacent said block to provide yielding frictional contact with said picker stick and positive cam engagement With said block.

6. In a loomA having a lay and a picker stick, a picker stick check comprising a frame fixed to the lay, a block longitudinally adjustable in said frame and having opposite inwardly-disposed cam faces, a pair of friction members longitudinally movable in said frame and engaging said cam faces when moved toward the end of the lay, and springs to move said members toward said block.

In testimony whereof we have hereunto aflixed our signatures.

EPPA H. RYON. RICHARD E. `VJELSH. 

